From Pastscape:
A late Iron Age sub-rectangular enclosure, previously thought to be a Roman Marching Camp was seen centred at SO 7140 4788 and mapped from aerial photographs. The site was excavated in autumn/winter 2000 and found to be a late Iron Age enclosure. The aerial photographs show the enclosure being defined by a single ditch, with straight sides and curved corners and measuring approximately 64m x 83m. In one corner are the faint traces of a curved enclosure or division with possible pits.